Revolving fire-arm



(No Model.)

J. H. WESSON.

RBVOLVING FIRE ARM.

Patented Jan. 3,1882.

Wizddew.

UNITED STATES i PATENT GEETCE.

JOSEPH H. VVESSON, OF SPRINGFIELD, MASSACHUSETTS.

REVOLVING FIRE-ARM.

SPECIFICATION forming part of Letters Patent No. 251,750, dated January 3, 1882,

Y Application filed September 23, 1881.

To all whom it may concern:

Be it known that I, JosEPH H. WEssoN, ot' Springfield, in the county of Hampden and i State of Massachusetts, have invented a new and useful Improvement in Revolving Fire Arms, of which the following is a speciication and description.

The object ot my invention is to provide a cylinder-stop for a revolving fire-arm which is cheap, durable, and ei'ective in its construction and operation, which is controlled in its engagements with the cylinder by the hammertumbler through the medium of the rear sear, with which the stop, which extends through or past the trigger, is immediately connected, and I accomplish this by the construction substantially as hereinafterdescribed, and illustrated in the accompanying drawings, in which- Figure I is a side view of a double-acting revolving lire-arm, with the lower portion ofthe frame broken away to show my invention as applied thereto 5 and Fig. II is a side view ot' the cylindenstop, sear, and hammentumbler in the relative posi-tions which they occupy in the arm, and their immediate connection with each other.

In the drawings Ihave shown my invention as applied to adoubleactingrevolver,inwhich 4 is the frame containing the revolving chambered cylinder, as 2, and lis the barrel, pivoted t0 the front lower portion ofthe frame.

The trigger, as 3, is pivoted in the frame at 5, and is connected at its rear end with thefront Sear, as 19, and the trigger is either halved or mortised in its rear upper part in a direction lengthwise the arm, to permit the rear portion of the cylinder-stop to extend through or past that portion ot' the trigger, as shown in dotted lines in Fig. I.

The cylinder-stop, as 6, is made in the form of a spring, or elastic in its forward part, and is secured at its front end firmly in the frame by a pin at 7, and its rear portion aboveis provided with a protuberance, as 18, adapted to engage with the stopnotches,asf17,in therear 'exterior portion of the cylinder, the lower rear part of the stop, as 15, extending through or past the recess made in the rear portion ofthe trigger.

The rea-r sear, as 9, is pivoted in the frame, as usual, at 14, and extends forward into a po- Sition and sufficiently far to engage with and (No model.)

depress the rear portion ot' the cylinderstop, as shown in Fig. Il and in dotted linesin Fig. I. The rear end ofthe senr 9 is provided with the ordinary catch to engage with thehammer-tumler, and the tumbler is provided with the ordinary recess, as 29, which in this case is provided at one end with a short straight notch, as 1 1, and inside of that a short incline, as 12, and at the other end otl said recess is a shoulder, as 13, which may be more orlessincliued, as desired.

A spring, as 2l, may be secured in any dcsired manner in the frame, to engage with and press the rear end of the sear, as 9, upward and into contact with the hammer-tumbler. When the hammer is down the rear end of the sear 9 bears up againstthehammer-tumbler, as shown clearly in'Fig. I, and the cylinder-stop is then in engagement with one of thecylinder-notches and the cylinder held stationary; and if the trigger is pressed back the front scar, 19, pivoted in the rear end ot' the trigger, moves the hammer backward a little in its cooking movement, and the rear end of the sear 9 is forced up into engagement with the short straight notch, as 11, by the action of the scar-spring .21, the hammer being then in its safety position, or at half-cock, the cylinder-stop being still in engagment with the notch in the cylinder. As the trigger is pressed still farther back the hammer is moved still farther backward in its cooking movement by the front Sear, 19, and 'the catch on the rear end of the sear 9 rides up the shortincline, as 12, which movementcauses the front end of the sear 9 to depress the cylinder-stop and disengage it from the cylinder, when it is then free to be revolved by the upward movement ot the hand, as 22, also connected with or pivoted to the trigger. As the backward cocking movement ot' the hammer continues, when the shoulder, as 13, comes in contact with the rear end of the sear 9, it de presses it, raising its front eud and allowing the cylinder-stop to move up against the cylinder and enter the next notch to hold it stationary. It will thus be seen that in all these movements the action and movement of the cylinder-stop is caused by and communicated from the hammer-tumbler, through the medium of the sear 9, directly past and independent of the trigger, the latter having no connection whatever with the cylinder-stop.

It. is evident that this invention is equally applicable to anyv ordinary revolving tire-arm as to what is known as a double-acting revolver,77 although 1 have illustrated it in the drawings as applied to the latter.

Having thus described my invention, what I claim as new is- 1. The combination, in arevolving` lire-arm,

of a cylinder-stop secured in the frame and adapted to engage in stop-recesses madein the cylinder and extending rearward past the trigger, a seal' pivoted in the frame and whose forward end engages with said cylinder-stop, a-

sear-spring to hold the sear into contact with the hammer-tumbler, and a hammer-tumbler adapted to engage with the rear end of said Sear, and thereby actuate the cylinder-stop in disengaging it from the cylinder independently from the trigger, substantially as described.

the said cylinder may be locked when the catch 3o i of the sear is in the safety-notch of the tumbler, and is released by the further backward movement ot' the hammer, substantially as described.

.v JOSEPH H. WESSON.

Witnesses:

T. A. CURTIS, E. M. BIssELL. 

